Linux Analysis Report
KAIKC433T0.elf

Overview

General Information

Sample name: KAIKC433T0.elf
renamed because original name is a hash value
Original sample name: 74490b8ab7e0b7120f433e990773b6d1.elf
Analysis ID: 1430934
MD5: 74490b8ab7e0b7120f433e990773b6d1
SHA1: 6e559a835e6d25641af9f4b96c8488a473a90e57
SHA256: 34e689798b2154ee73d68a3ddf7d2d9d403fc8a63294fd9b6bd8fac277e5be89
Tags: 32elfgafgytmotorola
Infos:

Detection

Gafgyt
Score: 76
Range: 0 - 100
Whitelisted: false

Signatures

Antivirus / Scanner detection for submitted sample
Multi AV Scanner detection for submitted file
Yara detected Gafgyt
Connects to many ports of the same IP (likely port scanning)
Contains symbols with names commonly found in malware
Opens /proc/net/* files useful for finding connected devices and routers
Detected TCP or UDP traffic on non-standard ports
Sample contains strings that are user agent strings indicative of HTTP manipulation
Tries to connect to HTTP servers, but all servers are down (expired dropper behavior)
Uses the "uname" system call to query kernel version information (possible evasion)

Classification

Name Description Attribution Blogpost URLs Link
Bashlite, Gafgyt Bashlite is a malware family which infects Linux systems in order to launch distributed denial-of-service attacks (DDoS). Originally it was also known under the name Bashdoor, but this term now refers to the exploit method used by the malware. It has been used to launch attacks of up to 400 Gbps. No Attribution https://malpedia.caad.fkie.fraunhofer.de/details/elf.bashlite

AV Detection
barindex
Antivirus / Scanner detection for submitted sample
Source: KAIKC433T0.elf Avira: detected
Multi AV Scanner detection for submitted file
Source: KAIKC433T0.elf Virustotal: Detection: 50% Perma Link
Source: KAIKC433T0.elf ReversingLabs: Detection: 47%

Spreading
barindex
Opens /proc/net/* files useful for finding connected devices and routers
Source: /tmp/KAIKC433T0.elf (PID: 6222) Opens: /proc/net/route Jump to behavior

Networking
barindex
Connects to many ports of the same IP (likely port scanning)
Source: global traffic TCP traffic: 2.58.95.131 ports 0,4,5,6,8,65480
Detected TCP or UDP traffic on non-standard ports
Source: global traffic TCP traffic: 192.168.2.23:37204 -> 2.58.95.131:65480
Tries to connect to HTTP servers, but all servers are down (expired dropper behavior)
Source: global traffic TCP traffic: 192.168.2.23:43928 -> 91.189.91.42:443
Source: global traffic TCP traffic: 192.168.2.23:42836 -> 91.189.91.43:443
Source: global traffic TCP traffic: 192.168.2.23:42516 -> 109.202.202.202:80
Source: unknown TCP traffic detected without corresponding DNS query: 2.58.95.131
Source: unknown TCP traffic detected without corresponding DNS query: 2.58.95.131
Source: unknown TCP traffic detected without corresponding DNS query: 2.58.95.131
Source: unknown TCP traffic detected without corresponding DNS query: 91.189.91.42
Source: unknown TCP traffic detected without corresponding DNS query: 2.58.95.131
Source: unknown TCP traffic detected without corresponding DNS query: 2.58.95.131
Source: unknown TCP traffic detected without corresponding DNS query: 91.189.91.43
Source: unknown TCP traffic detected without corresponding DNS query: 109.202.202.202
Source: unknown TCP traffic detected without corresponding DNS query: 91.189.91.42
Source: unknown TCP traffic detected without corresponding DNS query: 91.189.91.43
Source: unknown TCP traffic detected without corresponding DNS query: 109.202.202.202
Source: unknown TCP traffic detected without corresponding DNS query: 91.189.91.42
Source: unknown TCP traffic detected without corresponding DNS query: 2.58.95.131
Source: unknown TCP traffic detected without corresponding DNS query: 2.58.95.131
Source: unknown TCP traffic detected without corresponding DNS query: 2.58.95.131
Source: unknown TCP traffic detected without corresponding DNS query: 2.58.95.131
Source: unknown TCP traffic detected without corresponding DNS query: 2.58.95.131
Source: unknown TCP traffic detected without corresponding DNS query: 2.58.95.131
Source: unknown Network traffic detected: HTTP traffic on port 43928 -> 443
Source: unknown Network traffic detected: HTTP traffic on port 42836 -> 443

System Summary
barindex
Contains symbols with names commonly found in malware
Source: ELF static info symbol of initial sample Name: vseattack
Source: classification engine Classification label: mal76.spre.troj.linELF@0/1@0/0
Uses the "uname" system call to query kernel version information (possible evasion)
Source: /tmp/KAIKC433T0.elf (PID: 6222) Queries kernel information via 'uname': Jump to behavior
Source: KAIKC433T0.elf, 6222.1.00007ffee06de000.00007ffee06ff000.rw-.sdmp Binary or memory string: /tmp/qemu-open.SxyGWE
Source: KAIKC433T0.elf, 6222.1.00007ffee06de000.00007ffee06ff000.rw-.sdmp Binary or memory string: ieU/tmp/qemu-open.SxyGWE\
Source: KAIKC433T0.elf, 6222.1.00007ffee06de000.00007ffee06ff000.rw-.sdmp, KAIKC433T0.elf, 6224.1.00007ffee06de000.00007ffee06ff000.rw-.sdmp Binary or memory string: /usr/bin/qemu-m68k
Source: KAIKC433T0.elf, 6222.1.00007ffee06de000.00007ffee06ff000.rw-.sdmp, KAIKC433T0.elf, 6224.1.00007ffee06de000.00007ffee06ff000.rw-.sdmp Binary or memory string: x86_64/usr/bin/qemu-m68k/tmp/KAIKC433T0.elfSUDO_USER=saturninoPATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/snap/binDISPLAY=:1.0XAUTHORITY=/run/user/1000/gdm/XauthoritySUDO_UID=1000TERM=xterm-256colorCOLORTERM=truecolorLOGNAME=rootUSER=rootLANG=en_US.UTF-8SUDO_COMMAND=/bin/bashHOME=/rootMAIL=/var/mail/rootSUDO_GID=1000SHELL=/bin/bash/tmp/KAIKC433T0.elf
Source: KAIKC433T0.elf, 6222.1.000055656dd64000.000055656ddc8000.rw-.sdmp, KAIKC433T0.elf, 6224.1.000055656dd64000.000055656ddc8000.rw-.sdmp Binary or memory string: meU!/etc/qemu-binfmt/m68k
Source: KAIKC433T0.elf, 6222.1.000055656dd64000.000055656ddc8000.rw-.sdmp, KAIKC433T0.elf, 6224.1.000055656dd64000.000055656ddc8000.rw-.sdmp Binary or memory string: /etc/qemu-binfmt/m68k

Stealing of Sensitive Information
barindex
Yara detected Gafgyt
Source: Yara match File source: KAIKC433T0.elf, type: SAMPLE
Sample contains strings that are user agent strings indicative of HTTP manipulation
Source: Initial sample User agent string found: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/60.0.3112.113 Safari/537.36
Source: Initial sample User agent string found: Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/60.0.3112.90 Safari/537.36
Source: Initial sample User agent string found: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/44.0.2403.157 Safari/537.36
Source: Initial sample User agent string found: Mozilla/5.0 (Windows NT 5.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/46.0.2490.71 Safari/537.36
Source: Initial sample User agent string found: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3497.100 Safari/537.36
Source: Initial sample User agent string found: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.132 Safari/537.36
Source: Initial sample User agent string found: Mozilla/5.0 (Windows NT 5.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/60.0.3112.90 Safari/537.36

Remote Access Functionality
barindex
Yara detected Gafgyt
Source: Yara match File source: KAIKC433T0.elf, type: SAMPLE
windows-stand
  • No. of IPs < 25%
  • 25% < No. of IPs < 50%
  • 50% < No. of IPs < 75%
  • 75% < No. of IPs

Contacted Public IPs

IP Domain Country Flag ASN ASN Name Malicious
2.58.95.131
 unknown Germany
33657 CMCSUS true
109.202.202.202
 unknown Switzerland
13030 INIT7CH false
91.189.91.43
 unknown United Kingdom
41231 CANONICAL-ASGB false
91.189.91.42
 unknown United Kingdom
41231 CANONICAL-ASGB false